There is always more rubber bands, squirrel
s and fans as long as your wheels are large enough to coast. I did a lot of study and research on this when I built my car; second go around of course; fans can be mounted on top of the windshield, and there is enough clearance
under the wheel well with the larger FFR to insert medium size rodents (squirrels).
As a side note you can use the squirrels as bump brakes. You can carry extras in the trunk.